kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-18 19:12:56 +00:00
Code Issues Releases Packages Activity
linux/tools/testing/ktest
History
Steven Rostedt 72632af764 ktest.pl: Prevent recursion of default variable options 
[ Upstream commit 61f7e318e9 ]

If a default variable contains itself, do not recurse on it.

For example:

  ADD_CONFIG := ${CONFIG_DIR}/temp_config
  DEFAULTS
  ADD_CONFIG = ${CONFIG_DIR}/default_config ${ADD_CONFIG}

The above works because the temp variable ADD_CONFIG (is a temp because it
is created with ":=") is already defined, it will be substituted in the
variable option. But if it gets commented out:

  # ADD_CONFIG := ${CONFIG_DIR}/temp_config
  DEFAULTS
  ADD_CONFIG = ${CONFIG_DIR}/default_config ${ADD_CONFIG}

Then the above will go into a recursive loop where ${ADD_CONFIG} will
get replaced with the current definition of ADD_CONFIG which contains the
${ADD_CONFIG} and that will also try to get converted. ktest.pl will error
after 100 attempts of recursion and fail.

When replacing a variable with the default variable, if the default
variable contains itself, do not replace it.

Cc: "John Warthog9 Hawley" <warthog9@kernel.org>
Cc: Dhaval Giani <dhaval.giani@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/20250718202053.732189428@kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-08-28 16:24:20 +02:00
..
examples bootconfig/tracing/ktest: Update ktest example for boot-time tracing 2021-08-16 11:39:51 -04:00
compare-ktest-sample.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
config-bisect.pl ktest: Fix some typos in config-bisect.pl 2019-07-24 15:37:18 -04:00
ktest.pl ktest.pl: Prevent recursion of default variable options 2025-08-28 16:24:20 +02:00
sample.conf ktest.pl: Add RUN_TIMEOUT option with default unlimited 2023-03-10 09:40:10 +01:00